Siemens 3RT1456-6NB36 Power Contactor AC-1, 275A, 3-Pole, 690V, Electronic Drive, 2NO + 2NC Original Brand New

Overview

The Siemens 3RT1456-6NB36 is a high-performance AC-1 power contactor engineered for demanding industrial control applications. Designed for reliability, efficiency, and long service life, this 3-pole contactor supports 275 A at 690 V and operates flawlessly at ambient temperatures up to 40°C. With a control voltage range of 21–27.3 V AC (50–60 Hz) or DC, and a PLC-compatible 24 V DC electronic drive, this contactor ensures superior switching performance and optimal integration into modern automation systems.

Built with 2 NO + 2 NC auxiliary contacts, a robust busbar main circuit, and secure screw terminals for control and auxiliary wiring, the Siemens 3RT1456-6NB36 is an ideal solution for motor control centers, power distribution panels, and heavy-duty switching operations.

Features & Specifications

• Contactor Type: Power contactor, AC-1

• Rated Current: 275 A

• Rated Voltage: 690 V

• Poles: 3-pole

• Ambient Temperature Rating: 40 °C

• Control Voltage (Uc): 21–27.3 V AC (50–60 Hz) / DC

• PLC Input: 24 V DC

• Drive Technology: Electronic drive

• Auxiliary Contacts: 2 Normally Open (NO) + 2 Normally Closed (NC)

• Main Circuit Connection: Busbar

• Auxiliary Circuit Connection: Screw terminal

• Application: Industrial machinery, control panels, motor automation, power distribution systems

Benefit

High Reliability

Electronic drive technology ensures stable switching, reduced wear, and extended contactor lifespan.

Flexible Control Options

Supports AC or DC control signals, with optimized response for PLC systems operating at 24 V DC.

Heavy-Duty Performance

Suitable for demanding AC-1 applications with high current loads up to 275 A.

Easy Integration

Busbar main circuit and screw-terminal auxiliary circuit simplify installation in modern panel designs.

Enhanced Safety

Includes 2NO + 2NC auxiliary contacts for versatile monitoring and interlock functions.

Application

• Industrial manufacturing systems

• Automation & PLC-controlled processes

• HVAC and building control systems

• Motor and power distribution control

• Electrical panel construction

• Energy and utility control stations

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